Akron Water Pollution Control Station No Feasible Alternative

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Environmental Division Manager City Engineer Public Utilities Bureau Manager City of Akron Akron Water Pollution Control Station No Feasible Alternative (NFA) December 29, 2006 Prepared by: ARCADIS G&M of Ohio, Inc 520 South Main Street, Suite 2400 Akron, Ohio 44311-1010 Project Manager: Patrick D. Gsellman, P.E. AEB Environmental Division David A. Frank, P.E. 12/29/06
Akron Water Pollution Control Station No Feasible Alternative (NFA) TABLE OF CONTENTS Page i Page No. Table of Contents............................................................................................................. i List of Tables/Figures......................................................................................................iii Abbreviations/Symbols.................................................................................................... v 1. EXECUTIVE SUMMARY ...................................................................................... 1-1 2. INTRODUCTION .................................................................................................. 2-1 2.1. NFA Report Goal .................................................................................... 2-1 2.2. The CSO Policy ...................................................................................... 2-1 2.3. Background............................................................................................. 2-2 2.3.1. Facilities Planning Efforts............................................................. 2-2 2.3.2. Infrastructure Improvements ........................................................ 2-3 3. EXISTING WPCS CAPABILITIES ........................................................................ 3-1 3.1. General................................................................................................... 3-1 3.2. Hydraulic and Process Capacities .......................................................... 3-2 3.3. Secondary Treatment Limitations ........................................................... 3-7 3.3.1. Process Limitations...................................................................... 3-7 3.3.2. Hydraulic Limitations.................................................................... 3-8 3.3.3. Stress Tests ................................................................................. 3-9 3.4. Maximizing Flow to Secondary Treatment ............................................ 3-14 3.5. Summary of Secondary Treatment Capabilities.................................... 3-14 3.6. Conclusions .......................................................................................... 3-15 4. EVALUATION OF ALTERNATIVES ..................................................................... 4-1 4.1. Evaluation Factors .................................................................................. 4-1 4.2. Secondary Treatment Alternatives.......................................................... 4-3 4.2.1. Existing Process Limitations......................................................... 4-3 4.2.2. Secondary Treatment Alternatives............................................... 4-5 4.2.3. Feasibility Analysis of Secondary Treatment Alternatives............ 4-9 4.2.4. Solids Process Impacts.............................................................. 4-10 4.2.5. Summary.................................................................................... 4-12 4.3. Sewer Separation/Express Sewers....................................................... 4-13 4.3.1. Alternatives ................................................................................ 4-13 4.3.2. Feasibility Analysis..................................................................... 4-14 4.3.3. Summary.................................................................................... 4-18 4.4. Satellite Storage/Treatment Alternatives............................................... 4-18 4.4.1. Alternatives ................................................................................ 4-18 4.4.2. Analysis of Alternatives.............................................................. 4-20 4.4.3. Summary.................................................................................... 4-25
Page 1: City of Akron Akron Water Pollution
Page 5 and 6: TABLES Akron Water Pollution Contro
Page 7 and 8: Akron Water Pollution Control No Fe
Page 9 and 10: SECTION 1 EXECUTIVE SUMMARY The pur
Page 11 and 12: SECTION 2 INTRODUCTION 2.1. NFA Rep
Page 13 and 14: 150 MGD due to their hydraulics. Th
Page 15 and 16: SECTION 3 EXISTING WPCS CAPABILITIE
Page 17 and 18: Month Raw Influent Flow Table 3-2 2
Page 19 and 20: Table 3-3 (con’t) Akron WPCS Exis
Page 21 and 22: 3.3. Secondary Treatment Limitation
Page 23 and 24: The hydraulic evaluation prepared a
Page 25 and 26: • final settling tank influent di
Page 27 and 28: • The simulated 120 MGD test leve
Page 29 and 30: Table 3-4 Secondary Treatment Facil
Page 33 and 34: SECTION 4 EVALUATION OF ALTERNATIVE
Page 35 and 36: 5. Summarize high-rate treatment pi
Page 37 and 38: Table 4-4 Akron WPCS Average Influe
Page 39 and 40: For these reasons the Group 2 Alter
Page 41 and 42: effluent pumping and fine screening
Page 43 and 44: The 3-year solids production rate a
Page 45 and 46: The 120 MGD alternative requires fu
Page 47 and 48: The City of Akron has previously pe
Page 49 and 50: Type of Cost Capital O&M Present Wo
Page 51 and 52: ed), exhaust fans, and associated d
Page 53 and 54:
6. For each Rack, the minimum perfo
Page 55 and 56:
Rack # CBOD Present Worth ($) Table
Page 57 and 58:
CSO Control Technology Tunnels Tabl
Page 59 and 60:
• 20 MG of storage located near p
Page 61 and 62:
ecirculated back to the reactor tan
Page 63 and 64:
Table 4-13 HRT Design/Operational C
Page 65 and 66:
is its chemical coagulant and polym
Page 67 and 68:
Secondary Treatment Alternative "No
Page 69 and 70:
Final Settling Tanks Qp = 110 MGD 1
Page 71 and 72:
High Rate Treatment Qp = 110 MGD (B
Page 73 and 74:
Membrane Filters Qp = 110 MGD (Bypa
Page 75 and 76:
Modify Aeration Basins with MBR Qp
Page 77 and 78:
10 MG Storage 10 MG Storage 10 MG S
Page 79 and 80:
SECTION 5 ALTERNATIVE SCREENING 5.1
Page 81 and 82:
For the cost and non-cost reasons n
Page 83 and 84:
enefit analysis, it is recommended
Page 85 and 86:
5.3. Summary of Recommended Alterna
Page 87 and 88:
SECTION 7 BIBLIOGRAPHY 1. The Akron
Page 89 and 90:
ATTORNEY/CLIENT PRIVILEGE ATTORNEY
Page 91 and 92:
Akron Water Pollution Control Stati
Page 93 and 94:
cfs cubic feet per second DO dissol
Page 95 and 96:
SECTION 2 INTRODUCTION The Akron Wa
Page 97 and 98:
4. The Stress Test proceeded as fol
Page 99 and 100:
SECTION 4 STRESS TEST TRIALS 4.1. S
Page 101 and 102:
4.2. Simulated 144 MGD Test The pro
Page 103 and 104:
Based on observations and results o
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phosphorus. The apparent ineffectiv
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Concentration (mg/l) 10.0 9.0 8.0 7
Page 109 and 110:
TABLE 4-2 AKRON WPCS STRESS TEST Si
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
SECTION 5 CONCLUSIONS AND RECOMMEND
Page 117 and 118:
Appendix A City-Provided WPCS Data
Page 119 and 120:
AKRON WPCS 2006 120 MGD STRESS TEST
Page 121 and 122:
20-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
Page 123 and 124:
20-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
Page 125 and 126:
20-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
Page 127 and 128:
AKRON WPC 2006 144 MGD STRESS TEST
Page 129 and 130:
28-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
Page 131 and 132:
28-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
Page 133 and 134:
28-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
Page 135 and 136:
AKRON WPC 2006 120/132 MGD STRESS T
Page 137 and 138:
5-Dec-06 # 1 ML # 2 ML # 1 RAS # 2
Page 139:
5-Dec-06 # 1 ML # 2 ML # 1 RAS # 2
Page 235 and 236:
Cost Development Guidelines Appendi
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ALTERNATIVE 1C - 10 MGD SINGLE UNIT
Page 239 and 240:
ALTERNATIVE 1E - 100 MGD UNITS PROB
Page 241 and 242:
APPENDIX C Secondary Treatment Pres
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annually. The effort for the 40 MG
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Akron WPCS NFA Alternative 1 -Secon
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Akron WPCS NFA Alternative 1 -Secon
Page 249 and 250:
Akron WPCS NFA Alternative 1A 20 MG
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Akron WPCS NFA Alternative 1A 20 MG
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Akron WPCS NFA Alternative 1B 40 MG
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Akron WPCS NFA Alternative 1B 40 MG
Page 257 and 258:
Akron WPCS NFA Alternative 1C 10 MG
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Akron WPCS NFA Alternative 1C 10 MG
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Akron WPCS NFA Alternative 1D 50 MG
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Akron WPCS NFA Alternative 1D 50 MG
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Akron WPCS NFA Alternative 1E 100 M
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Akron WPCS NFA Alternative 1E 100 M
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Akron WPCS NFA Alternative 1F 150 M
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Akron WPCS NFA Alternative 1F 150 M
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Akron Water Pollution Control Station No Feasible Alternative

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